Broadcom BCM57508 NetXtreme-E 400GbE Ethernet Adapter

The Broadcom BCM57508 NetXtreme-E 400GbE Ethernet Adapter is built on Broadcom's advanced 5nm Ethernet ASIC architecture, delivering a full 400 Gigabit per second of bidirectional throughput over a single QSFP-DD800 port. The adapter interfaces with the host system via PCIe 5.0 x16, providing 128 GB/s of host bandwidth that prevents any upstream bottleneck even under sustained line-rate traffic. Hardware-offload engines for RoCEv2 (RDMA over Converged Ethernet version 2) enable sub-microsecond application-to-application latency, making the BCM57508 a purpose-built interconnect fabric element for GPU-to-GPU communications in large-scale AI and machine learning training clusters.

The BCM57508 integrates a full suite of stateless and stateful offload capabilities including Large Send Offload (LSO), Large Receive Offload (LRO), RSS/RFS, VXLAN/NVGRE/Geneve tunnel offload, and hardware-accelerated TLS 1.3 inline encryption. Its SmartNIC-class flow steering engine supports millions of flows with negligible CPU overhead, freeing host processor cores for compute workloads rather than network processing. The adapter natively supports SR-IOV with up to 256 virtual functions, enabling highly dense multi-tenant virtualization and container networking deployments without sacrificing per-tenant performance isolation.

Designed explicitly for hyperscale data center and enterprise AI infrastructure environments, the BCM57508 is compliant with IEEE 802.3cd and IEEE 400GBASE-DR4+ standards and supports PAM4 signal modulation for reach compatibility with both direct-attach copper cables and active optical cable assemblies. Comprehensive RAS (Reliability, Availability, Serviceability) features including ECC-protected on-chip memory, link-level error correction, and out-of-band management via NC-SI ensure the adapter meets carrier-class uptime requirements in mission-critical deployments.

Ideal for

• GPU cluster interconnect fabric for large-scale distributed AI and deep learning training jobs requiring ultra-low latency RDMA communications between nodes
• High-frequency financial trading infrastructure where deterministic sub-microsecond latency is mandatory for order execution and market data processing
• Hyperscale cloud storage backends leveraging RoCEv2 for NVMe-oF target and initiator connectivity at full 400GbE line rate
• High-performance computing (HPC) simulation clusters performing tightly-coupled MPI workloads that demand lossless, low-latency fabric interconnects
• Dense multi-tenant cloud hosting platforms utilizing SR-IOV to provision up to 256 isolated virtual network functions per physical adapter
• Enterprise network function virtualization (NFV) platforms offloading inline TLS 1.3 encryption and packet classification at 400Gbps to eliminate CPU bottlenecks

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.